<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="30%"
      @close="addDialogClosed"
    >
      <!-- 内容主体区 -->
      <el-form
        ref="addFormRef"
        :model="addForm"
        :rules="addFormRules"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户的对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="30%"
      @close="editDialogClosed"
    >
      <el-form
        ref="editFormRef"
        :model="editForm"
        :rules="editFormRules"
        label-width="100px"
      >
        <el-form-item label="角色名" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配角色的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      //所有权限的数据
      rightslist: [],
      //树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //默认选中的节点id值数组
      defKeys: [],
      //当前即将分配权限的角色id
      roleId: '',
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      editForm: {
        roleName: '',
        roleDesc: ''
      },
      //控制添加角色对话框的显示和隐藏
      addDialogVisible: false,
      editDialogVisible: false,
      //控制分配权限对话框的显示和隐藏
      setRightDialogVisible: false,
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          {
            min: 2,
            max: 10,
            message: '角色名的长度在 2 到 10 个字符',
            trigger: 'blur'
          }
        ]
      },
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          {
            min: 2,
            max: 10,
            message: '角色名的长度在 2 到 10 个字符',
            trigger: 'blur'
          }
        ]
      }
    }
  },
  created () {
    this.getRoleList()
  },
  methods: {
    // 获取所有角色的列表
    async getRoleList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }

      this.rolelist = res.data
    },
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },

    //添加角色
    addRole () {
      this.$refs.addFormRef.validate(async vaild => {
        if (!vaild) return
        //发起添加用户的请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败！')
        }
        this.$message.success('添加角色成功！')
        this.addDialogVisible = false

        //重新获取角色列表数据
        this.getRoleList()
      })
    },
    //展示编辑用户的对话框
    async showEditDialog (id) {
      console.log('id=' + id)
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败！')
      }

      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 提交编辑角色
    editRoleInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        //发起修改信息的请求
        const { data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          { roleName: this.editForm.roleName, mobile: this.editForm.roleDesc }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败！')
        }

        this.editDialogVisible = false
        this.getRoleList()
        this.$message.success('更新角色信息成功')
      })
    },
    //根据id删除对应的角色信息
    async removeRoleById (id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      //如果用户确认删除，则返回值为字符串 confirm
      //如果用户取消了删除，则返回值为字符串 cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }

      //发起请求删除
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败')
      }

      this.$message.success('删除角色成功')
      this.getRoleList()
    },
    //根据id删除对应的权限
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      //如果用户确认删除，则返回值为字符串 confirm
      //如果用户取消了删除，则返回值为字符串 cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }

      //发起请求删除
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }

      this.$message.success('删除权限成功')
      //   this.getRoleList()
      role.children = res.data
    },
    //展示分配角色的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      //获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }

      //把获取到的权限数据保存到data中
      console.log('数据在下：')
      console.log(res.data)
      this.rightslist = res.data

      //递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    //通过递归的形式，获取角色下的所有三级权限的id
    getLeafKeys (node, arr) {
      //不包含node不包含arr,则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听分配权限对话框的关闭
    setRightDialogClosed () {
      this.defKeys = []
    },
    //点击为角色分配权限
    async allotRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log(keys)
      const idStr = keys.join(',')
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
      
      if(res.meta.status !== 200){
        return this.$message.error('分配权限失败')
      }

      this.$message.success('分配权限成功')
      this.getRoleList()
      this.setRightDialogVisible = false

    }
  }
}
</script>

<style lang="less" scoped></style>
